noun, adverb
Rare literary word for the distant past. In modern Japanese, 昔 (むかし) or 過去 (かこ) are far more common.
昔時の風習を記録した書物は貴重だ。
Books that record the customs of old times are valuable.
この地には昔時から伝わる祭りがある。
This area has a festival that has been handed down from former times.